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/*
* V4L2 Codec decoding example application
* Kamil Debski <k.debski@samsung.com>
*
* Argument parser
*
* Copyright 2012 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <linux/videodev2.h>
#include "common.h"
#include "parser.h"
void print_usage(char *name)
{
// "d:f:i:m:c:V"
printf("Usage:\n");
printf("\t%s\n", name);
printf("\t-c <codec> - The codec of the encoded stream\n");
printf("\t\t Available codecs: mpeg4, h264\n");
printf("\t-d <device> - Frame buffer device (e.g. /dev/fb0)\n");
printf("\t-f <device> - FIMC device (e.g. /dev/video4)\n");
printf("\t-i <file> - Input file name\n");
printf("\t-m <device> - MFC device (e.g. /dev/video8)\n");
printf("\t-D <module>:<crtc>:<conn> - DRM module (e.g. exynos:4:17)\n");
printf("\t-B - use DMABUF instead of userptr for sharing buffers\n");
printf("\t-V - synchronise to vsync\n");
printf("\t\n");
printf("\tIf DRM or Frame buffer is used then FIMC should be suppplied.\n");
printf("\tOnly one of the following Frame Buffer, DRM can be used at a time.\n");
printf("\n");
}
void init_to_defaults(struct instance *i)
{
memset(i, 0, sizeof(*i));
}
int get_codec(char *str)
{
if (strncasecmp("mpeg4", str, 5) == 0) {
return V4L2_PIX_FMT_MPEG4;
} else if (strncasecmp("h264", str, 5) == 0) {
return V4L2_PIX_FMT_H264;
} else if (strncasecmp("h263", str, 5) == 0) {
return V4L2_PIX_FMT_H263;
} else if (strncasecmp("xvid", str, 5) == 0) {
return V4L2_PIX_FMT_XVID;
} else if (strncasecmp("mpeg2", str, 5) == 0) {
return V4L2_PIX_FMT_MPEG2;
} else if (strncasecmp("mpeg1", str, 5) == 0) {
return V4L2_PIX_FMT_MPEG1;
}
return 0;
}
int parse_args(struct instance *i, int argc, char **argv)
{
char *tmp;
int c;
init_to_defaults(i);
while ((c = getopt(argc, argv, "c:d:f:i:m:VD:B")) != -1) {
switch (c) {
case 'c':
i->parser.codec = get_codec(optarg);
break;
case 'd':
i->fb.name = optarg;
i->fb.enabled = 1;
break;
case 'f':
i->fimc.name = optarg;
i->fimc.enabled = 1;
break;
case 'i':
i->in.name = optarg;
break;
case 'm':
i->mfc.name = optarg;
break;
case 'V':
i->fimc.double_buf = 1;
break;
case 'B':
i->fimc.dmabuf = 1;
break;
case 'D':
/* Name */
tmp = optarg;
while (*tmp && *tmp != ':')
tmp++;
if (*tmp) {
i->drm.name = optarg;
*tmp = 0;
dbg("DRM module name: %s", optarg);
optarg = ++tmp;
} else {
break;
}
/* Crtc */
while (*tmp && *tmp != ':')
tmp++;
if (*tmp) {
*tmp = 0;
i->drm.crtc_id = atoi(optarg);
dbg("crtc: %d (%s)", i->drm.crtc_id, optarg);
optarg = ++tmp;
} else {
break;
}
/* Crtc */
while (*tmp && *tmp != ':')
tmp++;
i->drm.conn_id = atoi(optarg);
dbg("conn: %d (%s)", i->drm.conn_id, optarg);
i->drm.enabled = 1;
break;
default:
err("Bad argument");
return -1;
}
}
if (!i->parser.codec) {
err("Unknown or not set codec (-c)");
return -1;
}
if (!i->in.name || !i->mfc.name) {
err("The following arguments are required: -i -m -c");
return -1;
}
if (i->fimc.enabled) {
if (i->drm.enabled) {
dbg("Using DRM for display");
} else if (i->fb.enabled) {
dbg("Using FrameBuffer for display\n");
} else {
err("When using FIMC a framewbuffer or DRM has to be used\n");
return -1;
}
}
switch (i->parser.codec) {
case V4L2_PIX_FMT_XVID:
case V4L2_PIX_FMT_H263:
case V4L2_PIX_FMT_MPEG4:
i->parser.func = parse_mpeg4_stream;
break;
case V4L2_PIX_FMT_H264:
i->parser.func = parse_h264_stream;
break;
case V4L2_PIX_FMT_MPEG1:
case V4L2_PIX_FMT_MPEG2:
i->parser.func = parse_mpeg2_stream;
break;
}
return 0;
}
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